Recherche Images Maps Play YouTube Actualités Gmail Drive Plus »
Connexion
Les utilisateurs de lecteurs d'écran peuvent cliquer sur ce lien pour activer le mode d'accessibilité. Celui-ci propose les mêmes fonctionnalités principales, mais il est optimisé pour votre lecteur d'écran.

Brevets

  1. Recherche avancée dans les brevets
Numéro de publicationUS5779701 A
Type de publicationOctroi
Numéro de demandeUS 08/429,596
Date de publication14 juil. 1998
Date de dépôt27 avr. 1995
Date de priorité27 avr. 1995
État de paiement des fraisPayé
Autre référence de publicationCA2219107A1, EP0828457A1, EP0828457A4, WO1996033665A1
Numéro de publication08429596, 429596, US 5779701 A, US 5779701A, US-A-5779701, US5779701 A, US5779701A
InventeursMichael Sean McBrayer, Juergen Andrew Kortenbach
Cessionnaire d'origineSymbiosis Corporation
Exporter la citationBiBTeX, EndNote, RefMan
Liens externes: USPTO, Cession USPTO, Espacenet
Bipolar endoscopic surgical scissor blades and instrument incorporating the same
US 5779701 A
Résumé
Endoscopic bipolar scissor blades are formed in a laminate assembly of an outer electrically conductive layer, an intermediate electrically insulating layer, and an inner face layer which is a coating of titanium dioxide, chromium dioxide, or zirconium dioxide. In one embodiment, the conductive layer is a metal blade, while the insulating material is a ceramic which is fixed to the metal blade. In a second preferred embodiment, the insulating layer and the inner face layer are applied simultaneously by coating the metal blade with a mixture of ceramic and titanium dioxide, chromium dioxide, or zirconium dioxide. In a third embodiment, the insulating layer is a molded ceramic blade, and the electrically conductive layer is metalized or otherwise fixed to the ceramic blade. In all embodiments, the cutting edges and shearing surfaces are insulated from the electrodes, and no short circuit can form between the electrodes even though the cutting edges and shearing surfaces are metal. Each of the embodiments may be applied to straight or curved scissor blades. A bipolar endoscopic instrument utilizing blades according to the invention is also disclosed.
Images(6)
Previous page
Next page
Revendications(43)
We claim:
1. A bipolar electrosurgical instrument for cutting and coagulating tissue comprising:
a) first and second blade members each comprising a laminated assembly of an outer electrically conductive layer and an inner face layer comprising an element selected from the group consisting of titanium dioxide and chromium dioxide, said inner face layer forming a shearing surface of said blade member;
b) means for pivotally joining said first and second blade members together with their respective shearing surfaces facing one another;
c) means coupled to at least one of said first and second blade members for imparting a scissors-like movement relative to the other of said first and second blade members; and
d) means for applying a voltage between the outer electrically conductive layers of said first and second blade members.
2. A bipolar electrosurgical instrument according to claim 1, wherein:
each of said first and second blade members further comprises an intermediate electrically insulative layer between said outer electrically conductive layer and said inner face layer.
3. A bipolar electrosurgical instrument according to claim 2, wherein:
said intermediate electrically insulative layer is a ceramic.
4. A bipolar electrosurgical instrument according to claim 3, wherein:
said intermediate electrically insulative layer is alumina.
5. A bipolar electrosurgical instrument according to claim 2, wherein:
said inner face layer comprises titanium dioxide.
6. A bipolar electrosurgical instrument according to claim 2, wherein:
said outer conductive layer is applied to said intermediate electrically insulative layer by one of gluing, sputtering, metalizing, thermal spraying, and plating.
7. A bipolar electrosurgical instrument according to claim 2, wherein:
said outer conductive layer and said intermediate electrically insulative layer are not coextensive.
8. A bipolar electrosurgical instrument according to claim 1, wherein:
said inner face layer comprises a mixture of a ceramic and said element selected from the group consisting of titanium dioxide and chromium dioxide.
9. A bipolar electrosurgical instrument according to claim 8, wherein:
said ceramic is alumina.
10. A bipolar electrosurgical instrument according to claim 9, wherein:
said inner face layer comprises a mixture of alumina and titanium dioxide in a ratio by weight of between 75/25 and 95/5 of said alumina to said titanium dioxide.
11. A bipolar electrosurgical instrument according to claim 10, wherein:
said ratio is approximately 87/13 of said alumina to said titanium dioxide.
12. A bipolar electrosurgical instrument according to claim 1, wherein:
said shearing surfaces of said first and second blade members are curved.
13. A bipolar electrosurgical instrument according to claim 1, wherein:
said outer conductive layer is stainless steel.
14. A bipolar electrosurgical instrument according to claim 1, wherein:
said outer conductive layer and said inner face layer are not coextensive.
15. A bipolar electrosurgical instrument for cutting and coagulating tissue, comprising:
a) first and second blade members each having an inner shearing surface and a conductive portion, at least one of said blade members comprising a laminated assembly of an outer electrically conductive layer and an inner face layer comprising an element selected from the group consisting of titanium dioxide and chromium dioxide, and defining said inner shearing surface;
b) means for pivotally joining said first and second blade members with their respective inner shearing surfaces facing one another;
c) means coupled to at least one of said first and second blade members for imparting a scissors-like movement relative to the other of said first and second blade members; and
d) means for applying a voltage between said conductive portions of said first and second blade members.
16. A bipolar electrosurgical instrument according to claim 15, wherein:
said at least one of said blade members further comprises an intermediate electrically insulative layer between said outer electrically conductive layer and said inner face layer.
17. A bipolar electrosurgical instrument according to claim 16, wherein:
said intermediate electrically insulative layer is a ceramic.
18. A bipolar electrosurgical instrument according to claim 17, wherein:
said intermediate electrically insulative layer is alumina.
19. A bipolar electrosurgical instrument according to claim 16, wherein:
said inner face layer comprises titanium dioxide.
20. A bipolar electrosurgical instrument according to claim 16, wherein:
said outer conductive layer is applied to said intermediate electrically insulative layer by one of gluing, sputtering, metalizing, thermal spraying, and plating.
21. A bipolar electrosurgical instrument according to claim 16, wherein:
said outer conductive layer and said intermediate electrically insulative layer are not coextensive.
22. A bipolar electrosurgical instrument according to claim 15, wherein:
said inner face layer comprises a mixture of a ceramic and said element selected from the group consisting of titanium dioxide and chromium dioxide.
23. A bipolar electrosurgical instrument according to claim 22, wherein:
said ceramic is alumina.
24. A bipolar electrosurgical instrument according to claim 23, wherein:
said inner face layer comprises a mixture of alumina and titanium dioxide in a ratio by weight of between 75/25 and 95/5 of said alumina to said titanium dioxide.
25. A bipolar electrosurgical instrument according to claim 24, wherein:
said ratio is approximately 87/13 of said alumina to said titanium dioxide.
26. A bipolar electrosurgical instrument according to claim 15, wherein:
said shearing surfaces of said first and second blade members are curved.
27. A bipolar electrosurgical instrument according to claim 15, wherein:
said outer conductive layer is stainless steel.
28. A bipolar electrosurgical instrument according to claim 15, wherein:
said outer conductive layer and said inner face layer are not coextensive.
29. An endoscopic scissor blade for use in a bipolar endoscopic instrument, said blade comprising:
a) an inner face layer comprising an element selected from the group consisting of titanium dioxide and chromium dioxide, and defining an inner shearing surface;
b) an outer electrically conductive layer which is electrically insulated from said inner shearing surface; and
d) means for coupling a source of voltage to said outer electrically conductive layer.
30. An endoscopic scissor blade according to claim 29, further comprising:
e) means for pivotally mounting said scissor blade; and
f) means for coupling said scissor blade to a means for imparting a pivotal movement to said scissor blade.
31. An endoscopic scissor blade according to claim 29, further comprising:
e) an intermediate electrically insulative layer between said outer electrically conductive layer and said inner face layer.
32. An endoscopic scissor blade according to claim 31, wherein:
said intermediate electrically insulative layer is a ceramic.
33. An endoscopic scissor blade according to claim 32, wherein:
said intermediate electrically insulative layer is alumina.
34. An endoscopic scissor blade according to claim 31, wherein:
said inner face layer comprises titanium dioxide.
35. A bipolar electrosurgical instrument according to claim 31, wherein:
said outer conductive layer is applied to said intermediate electrically insulative layer by one of gluing, sputtering, metalizing, thermal spraying, and plating.
36. An endoscopic scissor blade according to claim 31, wherein:
said outer conductive layer and said intermediate electrically insulative layer are not coextensive.
37. An endoscopic scissor blade according to claim 29, wherein:
said inner face layer comprises a mixture of a ceramic and said element selected from the group consisting of titanium dioxide and chromium dioxide.
38. An endoscopic scissor blade according to claim 37, wherein:
said ceramic is alumina.
39. An endoscopic scissor blade according to claim 38, wherein:
said inner face layer comprises a mixture of alumina and titanium dioxide in a ratio by weight of between 75/25 and 95/5 of said alumina to said titanium dioxide.
40. A bipolar electrosurgical instrument according to claim 39, wherein:
said ratio is approximately 87/13 of said alumina to said titanium dioxide.
41. An endoscopic scissor blade according to claim 29, wherein:
said inner shearing surface is curved.
42. An endoscopic scissor blade according to claim 29, wherein:
said outer conductive layer is stainless steel.
43. An endoscopic scissor blade according to claim 29, wherein:
said outer conductive layer and said inner face layer are not coextensive.
Description
BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to endoscopic surgical instruments. More particularly, the invention relates to an endoscopic surgical instrument having end effectors made out of a combination of conductive and non-conductive materials. The invention has particular use with respect to bipolar endoscopic cautery. For purposes herein, the term "endoscopic instruments" is to be understood in its broadest sense to include laparoscopic, arthroscopic, and neurological instruments, as well as instruments which are inserted through an endoscope.

2. State of the Art

Endoscopic surgery is widely practiced throughout the world today and its acceptance is growing rapidly. In general, endoscopic/laparoscopic surgery involves one or more incisions made by trocars where trocar tubes are left in place so that endoscopic surgical tools may be inserted through the tubes. A camera, magnifying lens, or other optical instrument is often inserted through one trocar tube, while a cutter, dissector, or other surgical instrument is inserted through the same or another trocar tube for purposes of manipulating and/or cutting the internal organ. Sometimes it is desirable to have several trocar tubes in place at once in order to receive several surgical instruments. In this manner, organ or tissue may be grasped with one surgical instrument, and simultaneously may be cut with another surgical instrument; all under view of the surgeon via the optical instrument in place in the trocar tube.

Various types of endoscopic surgical instruments are known in the art. These instruments generally comprise a slender tube containing a push rod which is axially movable within the tube by means of a handle or trigger-like actuating means. An end effector is provided at the distal end of the tube and is coupled to the push rod by means of a clevis so that axial movement of the push rod is translated to rotational or pivotal movement of the end effector. End effectors may take the form of scissors, grippers, cutting jaws, forceps, and the like. Because of their very small size and the requirements of strength and/or sharpness, end effectors are difficult to manufacture and are typically formed of forged stainless steel. As such, they form an expensive portion of the endoscopic instrument.

Modern endoscopic procedures often involve the use of electrocautery, as the control of bleeding by coagulation during surgery is critical both in terms of limiting loss of blood and in permitting a clear viewing of the surgical site. As used herein, cautery, electrocautery, and coagulation are used interchangeably. Several types of electrocautery devices for use in endoscopic surgery are described in the prior art. Monopolar electrosurgical instruments employ the instrument as an electrode, with a large electrode plate beneath and in contact with the patient serving as the second electrode. High frequency voltage spikes are passed through the instrument to the electrode (i.e., end effector) of the endoscopic instrument to cause an arcing between the instrument and the proximate tissue of the patient. The current thereby generated continues through the patient to the large electrode plate beneath the patient. Monopolar cautery has the disadvantage that the current flows completely through the patient. Because control of the current path through the body is not possible, damage can occur to tissue both near and at some distance from the surgical site. In addition, it is has been observed that monopolar cautery can result in excessive tissue damage due to the arcing between the end effector and the tissue.

In order to overcome the problems associated with monopolar cautery instruments, bipolar instruments have been introduced. In bipolar electrosurgical instruments, two electrodes which are closely spaced together are utilized to contact the tissue. Typically, one end effector acts as the first electrode, and the other end effector acts as the second electrode, with the end effectors being electrically isolated from each other and each having a separate current path back through to the handle of the instrument. Thus, in a bipolar instrument, the current flow is from one end effector electrode, through the tissue to be cauterized, to the other end effector electrode.

Various endoscopic instruments with cautery capability are known in the art. U.S. Pat. No. 4,418,692 to Guay, for example, discloses a device for use in laparoscopic tubal cauterization for blocking the Fallopian tubes of a patient. The device comprises a substantially tubular body member having a spring-biased piston slidably mounted therein. A pair of electrodes (either monopolar or bipolar) are disposed to grasp living tissue when the piston is in a first position biased by the spring and to release the tissue when a button is pressed which moves the piston into a second position. The device includes a circuit breaker which interrupts current flowing to the electrodes when the piston is in the second position. When the electrodes grasp the tissue, however, current is supplied to the entire surface of the electrode, that is, both the grasping surface and the outer non-grasping surface.

Another electrosurgical instrument for use in combination with an endoscope is disclosed in U.S. Pat. No. 5,007,908 to Rydell for "Electrosurgical Instrument Having Needle Cutting Electrode and Spot-Coag Electrode". Rydell's device includes an elongated flexible tubular member with a plurality of lumens. The distal end of the tubular member is provided with a bullet shaped ceramic tip covered with a conductive layer and having an opening coupled to a first one of the lumens. The conductive layer is coupled to a conductor which extends through a second one of the lumens to an electrical source. A second conductor, also coupled to the electrical source is slidable through the first lumen by a plunger. The two electrodes form a bipolar pair. In a second embodiment, the conductive layer on the ceramic tip is split by an insulating gap and both halves of the tip form a bipolar pair of electrodes. As with the Guay device, above, substantially the entire distal surface of Rydell's device serves as an electrode when energized.

Several hemostatic bipolar electrosurgical scissors have also been described. U.S. Pat. No. 3,651,811 to Hildebrandt describes a bipolar electrosurgical scissors having opposing cutting blades forming active electrodes. The described scissors enables a surgeon to sequentially coagulate the blood vessels contained in the tissue and then to mechanically sever the tissue with the scissor blades. In particular, with the described bipolar electrosurgical scissors, the surgeon must first grasp the tissue with the scissor blades, energize the electrodes to cause hemostasis, de-energize the electrodes, and then close the scissor blades to sever the tissue mechanically. The scissors are then repositioned for another cut accomplished in the same manner. With the bipolar electrosurgical scissors of Hildebrandt, the surgeon cannot maintain the electrodes in a continuously energized state because the power supply would be shorted out and/or the blades damaged if the blades are permitted to contact each other while energized.

The disadvantages of the bipolar scissors of Hildebrandt are overcome by the disclosure in U.S. Pat. Nos. 5,324,289 and 5,330,471 to Eggers. In its preferred embodiment, the bipolar electrosurgical scissors of Eggers comprise a pair of metal scissor blades which are provided with an electrically insulating material interposed between the shearing surfaces of the blades so that when the scissor blades are closed, the metal of one blade never touches the metal of the other blade; i.e., the insulating material provides the cutting edge and the shearing surface. With the arrangement provided by Eggers, a cautery current will pass from the top back edge of the bottom metal blade through the tissue which is to be cut and to the bottom back edge of the top metal blade directly in advance of the cutting action. As the scissors are gradually closed, the hemostasis preferentially occurs at a location just in advance of the cutting point which itself moves distally along the insulated cutting edges of the blades in order to sever the hemostatically heated tissue. With this arrangement, the scissors may be maintained in a continuously energized state while performing the cutting. The Eggers patent describes various alternative embodiments of the bipolar scissors, including the use of metal blades with only one blade being insulated on its shearing surface, and the use of insulating blades with back surfaces coated with metal.

The disadvantage of scissor blades which have non-conductive cutting edges and shearing surfaces is that they are difficult to operate. The non-conductive surfaces are relatively non-lubricous and do not have the smooth operation and feel of a metal on metal cutting/shearing action.

SUMMARY OF THE INVENTION

It is therefore an object of the invention to provide a pair of scissor blades for a bipolar cauterizing surgical scissors which provide the smooth operation and feel of a metal on metal cutting/shearing action.

It is another object of the invention to provide a pair of scissor blades for a bipolar cauterizing surgical scissors which have shearing surfaces that are insulated from cautery surfaces.

It is also an object of the invention to provide an endoscopic bipolar cauterizing scissors which provide the smooth operation and feel of a metal on metal cutting/shearing action and which may be either curved or flat.

In accord with the objects of the invention, in a first embodiment, the scissor blades of the present invention are comprised of an electrically conductive electrode, an electrically insulating material, and a coating of titanium dioxide, chromium dioxide, or zirconium dioxide. In the first embodiment, the electrode layer is a metal blade which is typically constructed from stainless steel, while the insulating layer is an alumina ceramic which is deposited, bonded, or otherwise fixed on the metal blade, and a titanium dioxide coating is deposited, bonded, or otherwise fixed onto the ceramic and provides the cutting edge and shearing surface. The alumina and titanium dioxide are preferably deposited on a metal scissor blade by thermal spraying of granules at high temperature and standard atmospheric pressure. The titanium dioxide is lubricous and gives the scissor blades the operational feel of metal blades. While titanium dioxide is the preferred coating, chromium dioxide or zirconium dioxide can achieve similar results.

In a second and presently preferred embodiment of the invention, the electrode layer of the scissor blades is a metal blade, and the titanium dioxide is mixed with the alumina ceramic and then applied directly to the conductive electrode. In this preferred embodiment, the ratio by weight of alumina ceramic to titanium dioxide is 87/13, although the ratio can range from 75/5 to 95/5 and still provide the desired insulation and lubricity.

In a third embodiment of the invention, the insulating layer is a ceramic support, with the electrode layer and the titanium dioxide shearing surface layer being deposited, bonded, or otherwise fixed to opposite sides of the ceramic support.

In all embodiments, since the coated cutting edges and preferably at least a portion of the shearing surfaces are insulated from the electrodes, no short circuit can form between the electrodes even though the cutting edge and shearing surface of each scissor blade are in contact with the cutting edge and shearing surface of the other scissor blade.

As the scissor blades are intended for use as part of an endoscopic instrument, each blade is preferably provided with a first hole which receives an axle or clevis pin around which the blades rotate. In addition, each blade is preferably provided with a pin or protrusion extending from a proximal or base portion of the blade. The pins are provided to receive links which couple the blades to an actuator mechanism.

The endoscopic bipolar cautery scissors instrument which utilizes the blades of the invention is substantially as is described in copending U.S. applications Ser. No. 08/284,793, now U.S. Pat. No. 5,569,2 Ser. No. 08/354,992, and Ser. No. 08/377,156, the complete disclosures of which are hereby incorporated by reference herein, and preferably utilizes a push rod assembly with two conductive push rods which are stabilized and insulated relative to each other. The distal ends of the push rods are coupled to the end effectors by the links. The proximal ends of the push rods extend through the handle and lever of the scissors instrument and present electrical cautery pins onto which a standard bipolar cautery plug can be mated.

Additional objects and advantages of the invention will become apparent to those skilled in the art upon reference to the detailed description taken in conjunction with the provided figures.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a broken side elevation view in partial section of an endoscopic bipolar scissors instrument according to the invention;

FIG. 2 is an enlarged top view of a first embodiment of straight scissor blades according to the invention;

FIG. 3 is a cross sectional view of the scissor blades of FIG. 2 taken along lines 3--3 and shown in their operating positions;

FIG. 4 is a view similar to FIG. 3 but showing one of the scissor blades of FIGS. 2 and 3 in use with a conventional scissor blade in an alternative first embodiment;

FIG. 5 is a view similar to FIG. 3 but showing a second embodiment of straight scissor blades according to the invention;

FIG. 6 is a view similar to FIG. 2 of a third embodiment of straight scissor blades according to the invention;

FIG. 7 is a cross sectional view of the scissor blades of FIG. 6 taken along lines 7--7 and shown in their operating positions;

FIG. 8 is a view similar to FIGS. 2 and 6 of the first embodiment of curved scissor blades according to the invention;

FIG. 9 is a cross sectional view of the scissor blades of FIG. 8 taken along lines 9--9 and shown in their operating positions;

FIG. 10 is a view similar to FIG. 8 of the second embodiment of curved scissor blades according to the invention;

FIG. 11 is a cross sectional view of the scissor blades of FIG. 10 taken along lines 11--11 and shown in their operating positions;

FIG. 12 is a view similar to FIGS. 8 and 10 of the third embodiment of curved scissor blades according to the invention;

FIG. 13 is a cross sectional view of the scissor blades of FIG. 12 taken along lines 13--13 and shown in their operating positions;

FIG. 14 is a view similar to FIGS. 8, 10, and 12 of scissor blades according to the invention where one of the blades has layers which are not coextensive;

FIG. 15 is a side elevation view of the layered blade of FIG. 14;

FIG. 16a is a cross sectional view of the blade of FIG. 15, as taken along line 16--16, and according to the first embodiment of the invention;

FIG. 16b is a cross sectional view of the blade of FIG. 15, as taken along line 16--16, and according to the second embodiment of the invention; and

FIG. 16c is a cross sectional view of the blade of FIG. 15, as taken along line 16--16, and according to the third embodiment of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Turning now to FIG. 1, an endoscopic bipolar scissors instrument 10 includes a proximal handle 12 with a manual lever actuator 14 pivotally coupled to the handle by a pivot pin 15. A hollow stainless steel tube 16 is rotatably coupled to the handle 12 and is preferably rotatable about its longitudinal axis relative to the handle 12 through the use of a ferrule 18 such as described in detail in previously incorporated copending application Ser. No. 08/284,793. A push rod assembly 20 extends through the hollow tube 16 and is coupled at its proximal end 22 to the manual lever actuator 14 as described in more detail in copending application Ser. No. 08/284,793. The distal end of the tube 16 has an integral clevis 24 within which a pair of scissor blades 26, 28 are mounted on an axle screw 30. The distal end 23 of the push rod assembly 20 is coupled to the scissor blades 26, 28 so that reciprocal movement of the push rod assembly 20 relative to the tube 16 opens and closes the scissor blades 26, 28. It will be appreciated that the reciprocal movement of the push rod assembly 20 relative to the tube 16 is effected by movement of the manual lever actuator 14 relative to the handle 12.

The presently preferred embodiment of the push rod assembly 20 includes a pair of stainless steel rods 32, 34 which are molded into a proximal collar 36 and captured in a distal collar 46. The proximal collar has a radial groove 40 in its distal portion and an increased diameter proximal portion 37 which carries a pair of electrical coupling pins 39 which are electrically coupled to the rods 32, 34. As shown, the pins 39 are spaced farther apart from each other than the rods 32, 34 so as to accommodate a standard cautery connector. The rods 32, 34 are covered with insulating high density polyethylene (HDPE) tubes along substantially their entire length between the proximal and distal collars 36, 46. A plurality of spaced apart polypropylene cylinders 50 are molded about the rods between the proximal collar 36 and the distal collar 46. These cylinders stabilize the rods against helical twisting when the tube 16 is rotated and, by being discontinuous, prevent against warping of the push rod assembly. According to one embodiment, the distal collar 46 is made from two ceramic pieces which are snap fit and bonded to each other. The electrically conductive rods 32, 34 exit the distal collar 46 through opposite sides at substantially right angles. The distal ends of the rods 32, 34 are mechanically and electrically coupled to the respective blades 26, 28 by respective electrically conductive links 99.

Referring now to a first embodiment of straight scissor blades according invention seen in FIGS. 2 and 3, the first scissor blade 26 has a distal portion 26a, a lower proximal tang 26c, and a mounting hole 26d therebetween. A connecting lug 26e extends orthogonally outward from the surface of the tang 26c in a first direction. The distal portion 26a includes an lower cutting edge 26b and an inner surface 26f (also called the shearing surface). Behind the inner surface 26f of the first scissor blade is an insulating layer 26r, and a conducting electrode layer 26q. The opposed second scissor blade 28 is configured similarly to the first scissor blade and has a distal portion 28a, an upper proximal tang 28c, and a mounting hole 28d therebetween. A connecting lug 28e extends orthogonally from the surface of the tang 28c in a second direction which is opposite to the first direction mentioned above. The distal portion 28a includes an upper cutting edge 28b and an inner surface 28f. Behind the inner surface 28f of the second scissor blade 28 is an insulating layer 28r, and a conducting electrode layer 28q.

According to the first embodiment shown in FIGS. 2 and 3, both scissor blade assemblies 26 and 28 are laminated assemblies which include a metal support (also called a metal blade support or an outer conductive layer) 26q, 28q, an intermediate electrically insulative layer 26r, 28r and a coated face 26f, 28f defining a shearing surface. It will be appreciated that the Figures herein are not intended to depict the relative thickness of the layers according to any scale and that the thickness of the layers may be exaggerated for illustration purposes. The metal blade supports are preferably stainless steel, although any strong conductive metal may be used. The insulative layer is preferably alumina (Al2 O3), although any suitable ceramic may be used. In accord with the object of providing a metal-on-metal operational feel to the blades, the coated face is preferably a titanium dioxide ceramic (TiO2), although zirconium dioxide (ZiO2) or chromium dioxide (CrO2) ceramics can be used. The coating may be very thin and applied by bonding, chemical vapor deposition, thermal spray, plasma spray or other techniques. It will be appreciated, however, that the faces 26f, 28f are preferably provided with sharpened opposed cutting edges 26b, 28b which may be achieved by sharpening either the insulating layer 26r, 28r, the blade support 26q, 28q, or both either before or after applying the face coating of titanium dioxide. The metal blade supports 26q, 28q form the electrically conductive portions (i.e., the electrodes) of the scissor blades through which cautery current is applied. In this regard, substantially the entire lengths of blade supports 26q, 28q are conductive, including the proximal lugs 26e which make electrical connection with the respective rods 32, 34 via links 99 as described above with reference to FIG. 1. As seen in FIG. 3, the preferential path of current flow "E" is through the metal support portions 26q, 28q of the scissor blades which are insulated from the cutting edges 26b, 28b and the shearing surfaces (faces) 26f, 28f of the blades. Because of this arrangement, cautery and coagulation current may be applied continuously throughout the cutting/shearing procedure since the contact of the cutting edges and shearing surfaces of the blades will not short circuit the device. The titanium dioxide coating on the ceramic insulative layer gives the blades the operational feel of having metal on metal shearing surfaces.

Both the insulative layer and the face layer are preferably applied by thermal spraying of ceramic granules onto the blades. In thermal spraying, such as by a high velocity oxygen fuel (HVOF) system, micron sized powder (granules) of the ceramic is sprinkled into the combustion chamber of a rocket-type engine and is sprayed out of the chamber onto a desired substrate.

From the foregoing, it will be appreciated that in order to achieve the object of preventing the cutting edges and shearing surface from short circuiting the device, it is only necessary that one of the scissor blades be constructed as described above. FIG. 4 shows an alternative to the first embodiment of the invention where one of the blades 26 of the first embodiment is used in conjunction with a conventional scissor blade 128 which is entirely conductive. In this embodiment and in the embodiments described below, similar reference numerals refer to similar elements of the embodiments. As illustrated in FIG. 4, the preferential path of current flow "E" is through the metal support portion 26q of blade 26 to the shearing surface 128f and/or cutting edge 128b of the scissor blade 128.

According to a second and presently preferred embodiment of the invention shown in FIG. 5, scissor blades 226, 228 are formed of a metal blade support 226q, 228q which is substantially the same as the metal blade supports 26, 28 described above. In this embodiment, however, the insulative layer 226r, 228r and the face layer 226f, 228f are applied to the blade supports simultaneously as a single layer containing a mixture of alumina and titanium dioxide. The mixture of alumina and titanium dioxide is preferably applied to the metal blade support by mixing alumina and titanium dioxide granules and by thermal spraying the granules as described above. The weight ratio of the alumina and titanium dioxide in the mixture may range from 75/25 to 95/5 alumina to titanium dioxide, although an 87%/13% is presently preferred to provide the simultaneous insulative and lubricating functions. It should be appreciated that while an alumina/titania mixture is preferred, other mixtures such as alumina/chromia and alumina/zirconia could be utilized.

FIGS. 6 and 7 show a third embodiment of straight scissor blades 326, 328. According to this embodiment, both scissor blades 326 and 328 are laminated assemblies which include a blade support 326q', 328q', which itself is a laminated sub-assembly of a non-conductive core support 326r, 328r and an outer metallic layer support 326q, 328q. A titanium dioxide layer or face 326f, 320f defining a shearing surface is coated on the inner surface of the non-conductive core 326r, 328r. It will be appreciated that the blades 326, 328 are preferably provided with sharpened opposed cutting edges 326b, 328b. The outer metallic layers 326q, 328q of the blade supports 326q', 328q' form the electrode portions of the blades through which cautery current is applied. As seen best in FIG. 6, the outer metallic layers 326q, 328q extend along substantially the entire length of the blades (over the non-conductive cores 326r, 328r) to make an electrical connection with a source of cautery at the proximal connecting lugs 326e, 328e of the blades. As seen in FIG. 7, the path of preferential current flow "E" is through the electrode portions 326q, 328q of the blades which are insulated from the cutting edges and the shearing surfaces of the blades. Because of this arrangement, cautery current may be applied continuously throughout the cutting procedure since the contact of the shearing surfaces of the blades will not short circuit the device.

The embodiment shown in FIGS. 6 and 7 may be manufactured by molding ceramic cores 326r, 328r and laminating the outer conductive surfaces 326q, 328q with metal by gluing, sputtering, metalizing, thermal spraying, plating, etc. the metal layers onto the ceramic cores. The inner faces of titanium dioxide 326f are applied as described above. In this case, the ceramic material should preferably be formed (although not necessarily formed) with a flange type cross section as denoted by 326r', 328r' so that the outer metal laminates do not come too close to the TiO2 inner faces as the titanium dioxide ceramic is not a very good insulator. According to the presently preferred embodiment, the outer layers may be formed from a metal such as copper, gold, stainless steel, superalloy, or other conducting material. The ceramic cores 326r, 328r may be made of alumina, zirconia, or other suitable ceramic.

It will be appreciated that either of the blades 326, 328 from FIGS. 6 and 7 may be used with an opposed blade 26, 28, 226, 228 from FIGS. 2, 3, and 5, or with a conventional blade 128 from FIG. 4 as explained above with reference to FIG. 4.

As mentioned above, the invention may be used in conjunction with straight scissor blades or curved scissor blades. FIGS. 8-13 show the three embodiments of the invention described above, but in the context of curved scissor blades. Each of the first scissor blades 426, 526, 626 in FIGS. 8--13 has a curved distal portion 426a, 526a, 626a, a lower proximal tang 426c, 526a, 626a and a mounting hole 426d, 526d, 626d therebetween. A connecting lug 426e, 526e, 626e extends orthogonally outward from the surface of the tang 426c, 526c, 626c in a first direction. As shown in FIGS. 9, 11, and 13, the distal portion 426a, 526a, 626a includes a lower cutting edge 426b, 526b, 626b and an inner or shearing surface 426f, 526f, 626f. Behind the inner surface 426f, 526f, 626f of the first scissor blade is an insulating layer 426r, 526r, 626r, and a conducting electrode layer 426q, 526q, 626q. The opposed second scissor blade 428, 528, 628 is configured similarly to the first scissor blade and has a curved distal portion 428a, 528a, 628a, an upper proximal tang 428c, 528c, 628c, and a mounting hole 428d, 528d, 628d therebetween. A connecting lug 428e, 528e, 628e extends orthogonally from the surface of the tang 428c, 528c, 628c in a second direction which is opposite to the first direction mentioned above with regard to the first scissor blade 426, 526, 626. The distal portion 428a, 528a, 628a includes a upper cutting edge 428b, 528a, 628a and an inner surface 428f, 528f, 628f. Behind the inner surface 428f, 528f, 628f of the second scissor blade 428, 528, 628 is an insulating layer 428r, 528r, 628r, and a conducting electrode layer 428q, 528q, 628q.

The embodiment of FIGS. 8 and 9 is substantially the same as the embodiment of FIGS. 2 and 3, except for the curvature of the blades 426, 428. The embodiment of FIGS. 10 and 11 is substantially the same as the embodiment of FIG. 5, except for the curvature of the blades 526, 528. The embodiment of FIGS. 12 and 13 is substantially the same as the embodiment of FIGS. 6 and 7, except for the curvature of the blades 626, 628.

Turning now to FIGS. 14, 15, and 16a-16c, the layered scissor blades according to the invention may include layers having different surface areas. For example, the blade 728 seen in FIGS. 14, 15, and 16a, may be provided as a conductive layer 728q with an insulative layer 728r and a face layer 728f where the insulative layer and the face layer do not cover the entire facing surface of the conductive layer 728q. The blade 728 thus shown in FIG. 16a is manufactured according to the first embodiment of the invention where the conductive layer 728q is a metallic blade support and the insulative and face layers 728r, 728f are applied separately. However, as shown in FIG. 16a, the layers 728f and 728r are not coextensive with the conductive layer 728q, either horizontally or vertically. FIG. 16b shows this type of arrangement with a blade 728' while using the mixture of insulative and face layers 728'f,r as described above with reference to the second presently preferred embodiment of the invention. FIG. 16c shows a blade 728" which is manufactured according to the third embodiment of the invention described above, but where the conductive layer 728"q and the face layer 728"f are not coextensive with the insulative layer 728"r. Additional information about layered scissor blades having layers which are not coextensive is found in copending application Ser. No. 08/377,156 which has been incorporated herein by reference.

There have been described and illustrated herein several embodiments of bipolar endoscopic surgical scissor blades and an instrument incorporating them. While particular embodiments of the invention have been described, it is invention be that the invention be limited thereto, as it is intended that the invention be as broad in scope as the art will allow and that the specification be read likewise. Thus, while particular conductive and non-conductive materials have been disclosed, it will be appreciated that other materials could be utilized. Also, while blades of specific shape and dimension have been shown, it will be recognized that blades having different shapes and dimensions could be used with similar results obtained. While means for pivotally joining the blades has been shown as an axle screw with a nut, other pivotal joining means could be used. For example, a clevis with an integral axle pin, or a snap-in axle pin, or a riveted axle pin could all be used. While means for supplying each blade with a voltage has been shown as a bipolar push rod, it will be appreciated that other means such as a bipolar clevis and bipolar hollow tube could be used. Individual shielded electrical conductors within the hollow tube could also be used for this purpose. In addition, while the electrical coupling of the conductive portion of each blade has been shown as the proximal connecting lug which connects to a link, it will be appreciated that an electrical coupling could be made through a two piece bipolar clevis axle. Also, while the means for imparting scissor-like movement to the blades has been shown as a push rod, a pull wire or other reciprocating arrangement might be used as well. In addition, while the means for coupling the scissor blades to the push rod has been shown as an orthogonal lug, it will be understood that other means such as a connecting hole could be used while achieving substantially the same results. Moreover, while particular methods have been disclosed in reference to laminating conductive and non-conductive layers, it will be appreciated that other methods could be used as well.

Citations de brevets
Brevet cité Date de dépôt Date de publication Déposant Titre
US3651811 *10 oct. 196928 mars 1972Aesculap Werke AgSurgical cutting instrument
US4418692 *17 nov. 19786 déc. 1983Guay Jean LouisDevice for treating living tissue with an electric current
US4646734 *10 janv. 19863 mars 1987Codman & Shurtleff, Inc.Laser instrument
US4850353 *8 août 198825 juil. 1989Everest Medical CorporationSilicon nitride electrosurgical blade
US4862890 *29 févr. 19885 sept. 1989Everest Medical CorporationElectrosurgical spatula blade with ceramic substrate
US4958539 *2 juin 198925 sept. 1990Everest Medical CorporationMethod of making an electrosurgical spatula blade
US4962766 *19 juil. 198916 oct. 1990Herzon Garrett DNerve locator and stimulator
US5007908 *29 sept. 198916 avr. 1991Everest Medical CorporationElectrosurgical instrument having needle cutting electrode and spot-coag electrode
US5120596 *9 août 19919 juin 1992Kai R&D Center Co., Ltd.Coated blade
US5324289 *1 mai 199228 juin 1994Hemostatic Surgery CorporationHemostatic bi-polar electrosurgical cutting apparatus and methods of use
US5330471 *1 mai 199219 juil. 1994Hemostatic Surgery CorporationBi-polar electrosurgical endoscopic instruments and methods of use
US5342381 *11 févr. 199330 août 1994Everest Medical CorporationCombination bipolar scissors and forceps instrument
US5356408 *16 juil. 199318 oct. 1994Everest Medical CorporationBipolar electrosurgical scissors having nonlinear blades
US5562659 *9 sept. 19928 oct. 1996Materials Conversion Corp.Electro-surgical instrument and method of fabrication
EP0624348A2 *22 avr. 199417 nov. 1994United States Surgical CorporationBipolar electrosurgical instruments
FR2680314A1 * Titre non disponible
Référencé par
Brevet citant Date de dépôt Date de publication Déposant Titre
US5954720 *1 oct. 199721 sept. 1999Endoscopic Concepts, Inc.Bipolar electrosurgical end effectors
US5976132 *10 oct. 19972 nov. 1999Morris; James R.Bipolar surgical shears
US6334860 *16 août 20001 janv. 2002Karl Storz Gmbh & Co. KgBipolar medical instrument
US63582686 mars 200019 mars 2002Robert B. HuntSurgical instrument
US63582739 avr. 199919 mars 2002Oratec Inventions, Inc.Soft tissue heating apparatus with independent, cooperative heating sources
US6371956 *17 août 199916 avr. 2002Endoscopic Concepts, Inc.Monopolar electrosurgical end effectors
US6387094 *30 juin 200014 mai 2002Karl Storz Gmbh & Co. KgMedical instrument for dissecting tissue
US649488130 sept. 199717 déc. 2002Scimed Life Systems, Inc.Apparatus and method for electrode-surgical tissue removal having a selectively insulated electrode
US65062089 oct. 200114 janv. 2003Robert B. HuntSurgical instrument
US6558384 *29 mai 20016 mai 2003Aesculap Ag & Co. KgSurgical bipolar scissors
US667308715 déc. 20006 janv. 2004Origin MedsystemsElongated surgical scissors
US67496095 févr. 200215 juin 2004Origin Medsystems, Inc.Electrocautery scissors
US688724018 oct. 19993 mai 2005Sherwood Services AgVessel sealing wave jaw
US734453621 mai 200418 mars 2008Origin Medsystems, Inc.Electrocautery surgical scissors
US742259018 mai 20049 sept. 2008Aesculap AgSurgical instrument
US765500415 févr. 20072 févr. 2010Ethicon Endo-Surgery, Inc.Electroporation ablation apparatus, system, and method
US765500718 déc. 20062 févr. 2010Covidien AgMethod of fusing biomaterials with radiofrequency energy
US768680410 janv. 200630 mars 2010Covidien AgVessel sealer and divider with rotating sealer and cutter
US768682721 oct. 200530 mars 2010Covidien AgMagnetic closure mechanism for hemostat
US770873519 juil. 20054 mai 2010Covidien AgIncorporating rapid cooling in tissue fusion heating processes
US77226078 nov. 200625 mai 2010Covidien AgIn-line vessel sealer and divider
US774461518 juil. 200629 juin 2010Covidien AgApparatus and method for transecting tissue on a bipolar vessel sealing instrument
US775390929 avr. 200413 juil. 2010Covidien AgElectrosurgical instrument which reduces thermal damage to adjacent tissue
US77669109 nov. 20063 août 2010Tyco Healthcare Group LpVessel sealer and divider for large tissue structures
US77714256 févr. 200610 août 2010Covidien AgVessel sealer and divider having a variable jaw clamping mechanism
US777603613 mars 200317 août 2010Covidien AgBipolar concentric electrode assembly for soft tissue fusion
US77760377 juil. 200617 août 2010Covidien AgSystem and method for controlling electrode gap during tissue sealing
US778987829 sept. 20067 sept. 2010Covidien AgIn-line vessel sealer and divider
US779902613 nov. 200321 sept. 2010Covidien AgCompressible jaw configuration with bipolar RF output electrodes for soft tissue fusion
US779902826 sept. 200821 sept. 2010Covidien AgArticulating bipolar electrosurgical instrument
US78112838 oct. 200412 oct. 2010Covidien AgOpen vessel sealing instrument with hourglass cutting mechanism and over-ratchet safety
US78156628 mars 200719 oct. 2010Ethicon Endo-Surgery, Inc.Surgical suture anchors and deployment device
US781987229 sept. 200626 oct. 2010Covidien AgFlexible endoscopic catheter with ligasure
US782879827 mars 20089 nov. 2010Covidien AgLaparoscopic bipolar electrosurgical instrument
US783768513 juil. 200523 nov. 2010Covidien AgSwitch mechanisms for safe activation of energy on an electrosurgical instrument
US78461585 mai 20067 déc. 2010Covidien AgApparatus and method for electrode thermosurgery
US784616129 sept. 20067 déc. 2010Covidien AgInsulating boot for electrosurgical forceps
US785781218 déc. 200628 déc. 2010Covidien AgVessel sealer and divider having elongated knife stroke and safety for cutting mechanism
US785782714 avr. 200628 déc. 2010Ethicon Endo-Surgery, Inc.Endoscopic device
US787785219 sept. 20081 févr. 2011Tyco Healthcare Group LpMethod of manufacturing an end effector assembly for sealing tissue
US787785319 sept. 20081 févr. 2011Tyco Healthcare Group LpMethod of manufacturing end effector assembly for sealing tissue
US78790358 nov. 20061 févr. 2011Covidien AgInsulating boot for electrosurgical forceps
US788753517 août 200415 févr. 2011Covidien AgVessel sealing wave jaw
US788753619 août 200915 févr. 2011Covidien AgVessel sealing instrument
US789687812 mars 20091 mars 2011Coviden AgVessel sealing instrument
US790982317 janv. 200622 mars 2011Covidien AgOpen vessel sealing instrument
US792271812 oct. 200612 avr. 2011Covidien AgOpen vessel sealing instrument with cutting mechanism
US792295328 sept. 200612 avr. 2011Covidien AgMethod for manufacturing an end effector assembly
US793164914 févr. 200726 avr. 2011Tyco Healthcare Group LpVessel sealing instrument with electrical cutting mechanism
US793505214 févr. 20073 mai 2011Covidien AgForceps with spring loaded end effector assembly
US794704119 août 200924 mai 2011Covidien AgVessel sealing instrument
US795114230 janv. 200431 mai 2011Smith & Nephew, Inc.Cartilage treatment probe
US795114917 oct. 200631 mai 2011Tyco Healthcare Group LpAblative material for use with tissue treatment device
US795115022 févr. 201031 mai 2011Covidien AgVessel sealer and divider with rotating sealer and cutter
US795533221 sept. 20057 juin 2011Covidien AgMechanism for dividing tissue in a hemostat-style instrument
US796396510 mai 200721 juin 2011Covidien AgBipolar electrosurgical instrument for sealing vessels
US799816714 avr. 200616 août 2011Ethicon Endo-Surgery, Inc.End effector and method of manufacture
US80168279 oct. 200813 sept. 2011Tyco Healthcare Group LpApparatus, system, and method for performing an electrosurgical procedure
US802950410 déc. 20094 oct. 2011Ethicon Endo-Surgery, Inc.Electroporation ablation apparatus, system, and method
US80340521 nov. 201011 oct. 2011Covidien AgApparatus and method for electrode thermosurgery
US80375912 févr. 200918 oct. 2011Ethicon Endo-Surgery, Inc.Surgical scissors
US806670030 nov. 200429 nov. 2011Smith & Nephew, Inc.Cartilage treatment probe
US807074625 mai 20076 déc. 2011Tyco Healthcare Group LpRadiofrequency fusion of cardiac tissue
US807075930 mai 20086 déc. 2011Ethicon Endo-Surgery, Inc.Surgical fastening device
US807557226 avr. 200713 déc. 2011Ethicon Endo-Surgery, Inc.Surgical suturing apparatus
US810092227 avr. 200724 janv. 2012Ethicon Endo-Surgery, Inc.Curved needle suturing tool
US811407230 mai 200814 févr. 2012Ethicon Endo-Surgery, Inc.Electrical ablation device
US811410716 avr. 200714 févr. 2012Applied Medical Resources CorporationLaparoscopic scissor blades
US81141199 sept. 200814 févr. 2012Ethicon Endo-Surgery, Inc.Surgical grasping device
US812374329 juil. 200828 févr. 2012Covidien AgMechanism for dividing tissue in a hemostat-style instrument
US812862430 mai 20066 mars 2012Covidien AgElectrosurgical instrument that directs energy delivery and protects adjacent tissue
US81424733 oct. 200827 mars 2012Tyco Healthcare Group LpMethod of transferring rotational motion in an articulating surgical instrument
US814748917 févr. 20113 avr. 2012Covidien AgOpen vessel sealing instrument
US815783425 nov. 200817 avr. 2012Ethicon Endo-Surgery, Inc.Rotational coupling device for surgical instrument with flexible actuators
US816297315 août 200824 avr. 2012Tyco Healthcare Group LpMethod of transferring pressure in an articulating surgical instrument
US817277211 déc. 20088 mai 2012Ethicon Endo-Surgery, Inc.Specimen retrieval device
US819243321 août 20075 juin 2012Covidien AgVessel sealing instrument with electrical cutting mechanism
US819747910 déc. 200812 juin 2012Tyco Healthcare Group LpVessel sealer and divider
US819763315 mars 201112 juin 2012Covidien AgMethod for manufacturing an end effector assembly
US82111057 mai 20073 juil. 2012Covidien AgElectrosurgical instrument which reduces collateral damage to adjacent tissue
US821112515 août 20083 juil. 2012Ethicon Endo-Surgery, Inc.Sterile appliance delivery device for endoscopic procedures
US822141612 sept. 200817 juil. 2012Tyco Healthcare Group LpInsulating boot for electrosurgical forceps with thermoplastic clevis
US823599223 sept. 20087 août 2012Tyco Healthcare Group LpInsulating boot with mechanical reinforcement for electrosurgical forceps
US823599324 sept. 20087 août 2012Tyco Healthcare Group LpInsulating boot for electrosurgical forceps with exohinged structure
US823602523 sept. 20087 août 2012Tyco Healthcare Group LpSilicone insulated electrosurgical forceps
US824120429 août 200814 août 2012Ethicon Endo-Surgery, Inc.Articulating end cap
US82412825 sept. 200814 août 2012Tyco Healthcare Group LpVessel sealing cutting assemblies
US824128317 sept. 200814 août 2012Tyco Healthcare Group LpDual durometer insulating boot for electrosurgical forceps
US82412845 janv. 200914 août 2012Covidien AgVessel sealer and divider with non-conductive stop members
US825199623 sept. 200828 août 2012Tyco Healthcare Group LpInsulating sheath for electrosurgical forceps
US825205730 janv. 200928 août 2012Ethicon Endo-Surgery, Inc.Surgical access device
US82573527 sept. 20104 sept. 2012Covidien AgBipolar forceps having monopolar extension
US825738715 août 20084 sept. 2012Tyco Healthcare Group LpMethod of transferring pressure in an articulating surgical instrument
US826256314 juil. 200811 sept. 2012Ethicon Endo-Surgery, Inc.Endoscopic translumenal articulatable steerable overtube
US826265521 nov. 200711 sept. 2012Ethicon Endo-Surgery, Inc.Bipolar forceps
US826268010 mars 200811 sept. 2012Ethicon Endo-Surgery, Inc.Anastomotic device
US82679354 avr. 200718 sept. 2012Tyco Healthcare Group LpElectrosurgical instrument reducing current densities at an insulator conductor junction
US826793623 sept. 200818 sept. 2012Tyco Healthcare Group LpInsulating mechanically-interfaced adhesive for electrosurgical forceps
US827744718 nov. 20092 oct. 2012Covidien AgSingle action tissue sealer
US829822816 sept. 200830 oct. 2012Coviden AgElectrosurgical instrument which reduces collateral damage to adjacent tissue
US829823224 mars 200930 oct. 2012Tyco Healthcare Group LpEndoscopic vessel sealer and divider for large tissue structures
US8303582 *15 sept. 20086 nov. 2012Tyco Healthcare Group LpElectrosurgical instrument having a coated electrode utilizing an atomic layer deposition technique
US830358610 févr. 20096 nov. 2012Covidien AgSpring loaded reciprocating tissue cutting mechanism in a forceps-style electrosurgical instrument
US831350014 avr. 200620 nov. 2012Ethicon Endo-Surgery, Inc.Endoscopic device
US831778728 août 200827 nov. 2012Covidien LpTissue fusion jaw angle improvement
US831780630 mai 200827 nov. 2012Ethicon Endo-Surgery, Inc.Endoscopic suturing tension controlling and indication devices
US83337654 juin 201218 déc. 2012Covidien AgVessel sealing instrument with electrical cutting mechanism
US83373941 oct. 200825 déc. 2012Ethicon Endo-Surgery, Inc.Overtube with expandable tip
US834894829 juil. 20108 janv. 2013Covidien AgVessel sealing system using capacitive RF dielectric heating
US835348717 déc. 200915 janv. 2013Ethicon Endo-Surgery, Inc.User interface support devices for endoscopic surgical instruments
US836106612 janv. 200929 janv. 2013Ethicon Endo-Surgery, Inc.Electrical ablation devices
US836107128 août 200829 janv. 2013Covidien AgVessel sealing forceps with disposable electrodes
US836107219 nov. 201029 janv. 2013Covidien AgInsulating boot for electrosurgical forceps
US836111227 juin 200829 janv. 2013Ethicon Endo-Surgery, Inc.Surgical suture arrangement
US836670927 déc. 20115 févr. 2013Covidien AgArticulating bipolar electrosurgical instrument
US837705827 mai 201119 févr. 2013Smith & Nephew, Inc.Cartilage treatment probe
US838275426 janv. 200926 févr. 2013Covidien AgElectrosurgical forceps with slow closure sealing plates and method of sealing tissue
US839409512 janv. 201112 mars 2013Covidien AgInsulating boot for electrosurgical forceps
US839409611 avr. 201112 mars 2013Covidien AgOpen vessel sealing instrument with cutting mechanism
US84039265 juin 200826 mars 2013Ethicon Endo-Surgery, Inc.Manually articulating devices
US84092003 sept. 20082 avr. 2013Ethicon Endo-Surgery, Inc.Surgical grasping device
US842550430 nov. 201123 avr. 2013Covidien LpRadiofrequency fusion of cardiac tissue
US842550525 août 201123 avr. 2013Ethicon Endo-Surgery, Inc.Electroporation ablation apparatus, system, and method
US842551126 mars 201023 avr. 2013Covidien LpClamp and scissor forceps
US844953827 janv. 201028 mai 2013Ethicon Endo-Surgery, Inc.Electroporation ablation apparatus, system, and method
US84546024 mai 20124 juin 2013Covidien LpApparatus, system, and method for performing an electrosurgical procedure
US846995621 juil. 200825 juin 2013Covidien LpVariable resistor jaw
US84699577 oct. 200825 juin 2013Covidien LpApparatus, system, and method for performing an electrosurgical procedure
US848065731 oct. 20079 juil. 2013Ethicon Endo-Surgery, Inc.Detachable distal overtube section and methods for forming a sealable opening in the wall of an organ
US84806892 sept. 20089 juil. 2013Ethicon Endo-Surgery, Inc.Suturing device
US848610720 oct. 200816 juil. 2013Covidien LpMethod of sealing tissue using radiofrequency energy
US849657417 déc. 200930 juil. 2013Ethicon Endo-Surgery, Inc.Selectively positionable camera for surgical guide tube assembly
US849665616 janv. 200930 juil. 2013Covidien AgTissue sealer with non-conductive variable stop members and method of sealing tissue
US850073414 sept. 20126 août 2013Smith & Nephew, Inc.Cartilage treatment probe
US850656418 déc. 200913 août 2013Ethicon Endo-Surgery, Inc.Surgical instrument comprising an electrode
US852389810 août 20123 sept. 2013Covidien LpEndoscopic electrosurgical jaws with offset knife
US852956325 août 200810 sept. 2013Ethicon Endo-Surgery, Inc.Electrical ablation devices
US853531225 sept. 200817 sept. 2013Covidien LpApparatus, system and method for performing an electrosurgical procedure
US854071111 juil. 200724 sept. 2013Covidien AgVessel sealer and divider
US855109130 mars 20118 oct. 2013Covidien AgVessel sealing instrument with electrical cutting mechanism
US856841025 avr. 200829 oct. 2013Ethicon Endo-Surgery, Inc.Electrical ablation surgical instruments
US85684447 mars 201229 oct. 2013Covidien LpMethod of transferring rotational motion in an articulating surgical instrument
US857989721 nov. 200712 nov. 2013Ethicon Endo-Surgery, Inc.Bipolar forceps
US859150616 oct. 201226 nov. 2013Covidien AgVessel sealing system
US859729631 août 20123 déc. 2013Covidien AgBipolar forceps having monopolar extension
US859729729 août 20063 déc. 2013Covidien AgVessel sealing instrument with multiple electrode configurations
US86086525 nov. 200917 déc. 2013Ethicon Endo-Surgery, Inc.Vaginal entry surgical devices, kit, system, and method
US862301723 juil. 20097 janv. 2014Covidien AgOpen vessel sealing instrument with hourglass cutting mechanism and overratchet safety
US86232769 févr. 20097 janv. 2014Covidien LpMethod and system for sterilizing an electrosurgical instrument
US86367619 oct. 200828 janv. 2014Covidien LpApparatus, system, and method for performing an endoscopic electrosurgical procedure
US864171315 sept. 20104 févr. 2014Covidien AgFlexible endoscopic catheter with ligasure
US864734127 oct. 200611 févr. 2014Covidien AgVessel sealer and divider for use with small trocars and cannulas
US865215030 mai 200818 févr. 2014Ethicon Endo-Surgery, Inc.Multifunction surgical device
US866868919 avr. 201011 mars 2014Covidien AgIn-line vessel sealer and divider
US867900330 mai 200825 mars 2014Ethicon Endo-Surgery, Inc.Surgical device and endoscope including same
US867911423 avr. 201025 mars 2014Covidien AgIncorporating rapid cooling in tissue fusion heating processes
US86966679 août 201215 avr. 2014Covidien LpDual durometer insulating boot for electrosurgical forceps
US873444319 sept. 200827 mai 2014Covidien LpVessel sealer and divider for large tissue structures
US874085314 avr. 20063 juin 2014Ethicon Endo-Surgery, Inc.Endoscopic device and method of packaging
US874090120 janv. 20103 juin 2014Covidien AgVessel sealing instrument with electrical cutting mechanism
US876474828 janv. 20091 juil. 2014Covidien LpEnd effector assembly for electrosurgical device and method for making the same
US877126030 mai 20088 juil. 2014Ethicon Endo-Surgery, Inc.Actuating and articulating surgical device
US878441728 août 200822 juil. 2014Covidien LpTissue fusion jaw angle improvement
US879527428 août 20085 août 2014Covidien LpTissue fusion jaw angle improvement
US881486423 août 201026 août 2014Covidien LpMethod of manufacturing tissue sealing electrodes
US882803112 janv. 20099 sept. 2014Ethicon Endo-Surgery, Inc.Apparatus for forming an anastomosis
US885218322 janv. 20107 oct. 2014Microline Surgical Inc.Scissor tip for bipolar high frequency endoscope
US88522288 févr. 20127 oct. 2014Covidien LpApparatus, system, and method for performing an electrosurgical procedure
US88585544 juin 201314 oct. 2014Covidien LpApparatus, system, and method for performing an electrosurgical procedure
US888276624 janv. 200611 nov. 2014Covidien AgMethod and system for controlling delivery of energy to divide tissue
US888879214 juil. 200818 nov. 2014Ethicon Endo-Surgery, Inc.Tissue apposition clip application devices and methods
US889888826 janv. 20122 déc. 2014Covidien LpSystem for manufacturing electrosurgical seal plates
US89060354 juin 20089 déc. 2014Ethicon Endo-Surgery, Inc.Endoscopic drop off bag
US89398974 févr. 201127 janv. 2015Ethicon Endo-Surgery, Inc.Methods for closing a gastrotomy
US893997327 nov. 201327 janv. 2015Covidien AgSingle action tissue sealer
US894512510 sept. 20103 févr. 2015Covidien AgCompressible jaw configuration with bipolar RF output electrodes for soft tissue fusion
US894512627 nov. 20133 févr. 2015Covidien AgSingle action tissue sealer
US894512723 janv. 20143 févr. 2015Covidien AgSingle action tissue sealer
US896831425 sept. 20083 mars 2015Covidien LpApparatus, system and method for performing an electrosurgical procedure
US898619917 févr. 201224 mars 2015Ethicon Endo-Surgery, Inc.Apparatus and methods for cleaning the lens of an endoscope
US900519829 janv. 201014 avr. 2015Ethicon Endo-Surgery, Inc.Surgical instrument comprising an electrode
US90114314 sept. 201221 avr. 2015Ethicon Endo-Surgery, Inc.Electrical ablation devices
US902304323 sept. 20085 mai 2015Covidien LpInsulating mechanically-interfaced boot and jaws for electrosurgical forceps
US902848318 déc. 200912 mai 2015Ethicon Endo-Surgery, Inc.Surgical instrument comprising an electrode
US90284938 mars 201212 mai 2015Covidien LpIn vivo attachable and detachable end effector assembly and laparoscopic surgical instrument and methods therefor
US904998715 mars 20129 juin 2015Ethicon Endo-Surgery, Inc.Hand held surgical device for manipulating an internal magnet assembly within a patient
US90786623 juil. 201214 juil. 2015Ethicon Endo-Surgery, Inc.Endoscopic cap electrode and method for using the same
US9078677 *3 déc. 201214 juil. 2015Ethicon Endo-Surgery, Inc.Surgical instrument with curved blade firing path
US909534718 sept. 20084 août 2015Covidien AgElectrically conductive/insulative over shoe for tissue fusion
US910767219 juil. 200618 août 2015Covidien AgVessel sealing forceps with disposable electrodes
US91138989 sept. 201125 août 2015Covidien LpApparatus, system, and method for performing an electrosurgical procedure
US911390329 oct. 201225 août 2015Covidien LpEndoscopic vessel sealer and divider for large tissue structures
US911390520 juin 201325 août 2015Covidien LpVariable resistor jaw
US911394022 févr. 201225 août 2015Covidien LpTrigger lockout and kickback mechanism for surgical instruments
US914932325 janv. 20106 oct. 2015Covidien AgMethod of fusing biomaterials with radiofrequency energy
US919243123 juil. 201024 nov. 2015Ethicon Endo-Surgery, Inc.Electrosurgical cutting and sealing instrument
US91987172 févr. 20151 déc. 2015Covidien AgSingle action tissue sealer
US922052620 mars 201229 déc. 2015Ethicon Endo-Surgery, Inc.Rotational coupling device for surgical instrument with flexible actuators
US922677230 janv. 20095 janv. 2016Ethicon Endo-Surgery, Inc.Surgical device
US923324118 janv. 201212 janv. 2016Ethicon Endo-Surgery, Inc.Electrical ablation devices and methods
US924798821 juil. 20152 févr. 2016Covidien LpVariable resistor jaw
US925416928 févr. 20119 févr. 2016Ethicon Endo-Surgery, Inc.Electrical ablation devices and methods
US92655522 déc. 201423 févr. 2016Covidien LpMethod of manufacturing electrosurgical seal plates
US92659268 nov. 201323 févr. 2016Ethicon Endo-Surgery, LlcElectrosurgical devices
US927795715 août 20128 mars 2016Ethicon Endo-Surgery, Inc.Electrosurgical devices and methods
US928302723 oct. 201215 mars 2016Ethicon Endo-Surgery, LlcBattery drain kill feature in a battery powered device
US929551430 août 201329 mars 2016Ethicon Endo-Surgery, LlcSurgical devices with close quarter articulation features
US931429223 oct. 201219 avr. 2016Ethicon Endo-Surgery, LlcTrigger lockout mechanism
US931462028 févr. 201119 avr. 2016Ethicon Endo-Surgery, Inc.Electrical ablation devices and methods
US933302523 oct. 201210 mai 2016Ethicon Endo-Surgery, LlcBattery initialization clip
US934553514 oct. 201424 mai 2016Covidien LpApparatus, system and method for performing an electrosurgical procedure
US937523210 mars 201428 juin 2016Ethicon Endo-Surgery, LlcSurgical cutting and sealing instrument with reduced firing force
US937525425 sept. 200828 juin 2016Covidien LpSeal and separate algorithm
US93752689 mai 201328 juin 2016Ethicon Endo-Surgery, Inc.Electroporation ablation apparatus, system, and method
US93752705 nov. 201328 juin 2016Covidien AgVessel sealing system
US93752715 nov. 201328 juin 2016Covidien AgVessel sealing system
US940866017 janv. 20149 août 2016Ethicon Endo-Surgery, LlcDevice trigger dampening mechanism
US941488023 oct. 201216 août 2016Ethicon Endo-Surgery, LlcUser interface in a battery powered device
US942106023 oct. 201223 août 2016Ethicon Endo-Surgery, LlcLitz wire battery powered device
US942725514 mai 201230 août 2016Ethicon Endo-Surgery, Inc.Apparatus for introducing a steerable camera assembly into a patient
US944586314 mars 201420 sept. 2016Gyrus Acmi, Inc.Combination electrosurgical device
US945200914 mars 201427 sept. 2016Gyrus Acmi, Inc.Combination electrosurgical device
US945201112 mars 201427 sept. 2016Gyrus Acmi, Inc.Combination electrosurgical device
US94568643 févr. 20144 oct. 2016Ethicon Endo-Surgery, LlcSurgical instruments and end effectors therefor
US94630675 nov. 201311 oct. 2016Covidien AgVessel sealing system
US949222420 sept. 201315 nov. 2016EthiconEndo-Surgery, LLCMulti-function bi-polar forceps
US949222511 févr. 201415 nov. 2016Covidien AgVessel sealer and divider for use with small trocars and cannulas
US95265658 nov. 201327 déc. 2016Ethicon Endo-Surgery, LlcElectrosurgical devices
US95390539 mai 201410 janv. 2017Covidien LpVessel sealer and divider for large tissue structures
US954529030 juil. 201217 janv. 2017Ethicon Endo-Surgery, Inc.Needle probe guide
US954977511 mars 201424 janv. 2017Covidien AgIn-line vessel sealer and divider
US955484110 avr. 201431 janv. 2017Covidien LpDual durometer insulating boot for electrosurgical forceps
US955484625 août 201431 janv. 2017Ethicon Endo-Surgery, LlcSurgical instrument with jaw member
US955485418 mars 201431 janv. 2017Ethicon Endo-Surgery, LlcDetecting short circuits in electrosurgical medical devices
US95726232 août 201221 févr. 2017Ethicon Endo-Surgery, Inc.Reusable electrode and disposable sheath
US95791454 févr. 201428 févr. 2017Covidien AgFlexible endoscopic catheter with ligasure
US95857163 juin 20147 mars 2017Covidien AgVessel sealing instrument with electrical cutting mechanism
US960365221 août 200828 mars 2017Covidien LpElectrosurgical instrument including a sensor
US961009110 mars 20144 avr. 2017Ethicon Endo-Surgery, LlcElectrosurgical cutting and sealing instruments with jaws having a parallel closure motion
US96556741 oct. 201423 mai 2017Covidien LpApparatus, system and method for performing an electrosurgical procedure
US966880514 mars 20146 juin 2017Gyrus Acmi IncCombination electrosurgical device
US970033330 juin 201411 juil. 2017Ethicon LlcSurgical instrument with variable tissue compression
US970702819 août 201518 juil. 2017Gyrus Acmi, Inc.Multi-mode combination electrosurgical device
US970703030 juin 201418 juil. 2017Ethicon Endo-Surgery, LlcSurgical instrument with jaw member
US973735531 mars 201422 août 2017Ethicon LlcControlling impedance rise in electrosurgical medical devices
US973735724 sept. 201322 août 2017Covidien AgVessel sealer and divider
US973735820 mars 201522 août 2017Ethicon LlcHeat management configurations for controlling heat dissipation from electrosurgical instruments
US975056122 févr. 20165 sept. 2017Covidien LpSystem for manufacturing electrosurgical seal plates
US975718617 avr. 201412 sept. 2017Ethicon LlcDevice status feedback for bipolar tissue spacer
US20030014052 *6 juin 200216 janv. 2003Buysse Steven P.Laparoscopic bipolar electrosurgical instrument
US20030018331 *25 juin 200223 janv. 2003Dycus Sean T.Vessel sealer and divider
US20030018332 *17 sept. 200223 janv. 2003Schmaltz Dale FrancisBipolar electrosurgical instrument with replaceable electrodes
US20030181910 *8 janv. 200325 sept. 2003Dycus Sean T.Bipolar electrosurgical forceps with non-conductive stop members
US20030191465 *2 avr. 20039 oct. 2003Pentax CorporationElectrosurgicalscissors for endoscopic mucosal resection
US20030199869 *30 oct. 200223 oct. 2003Johnson Kristin D.Vessel sealing instrument
US20030229344 *20 févr. 200311 déc. 2003Dycus Sean T.Vessel sealer and divider and method of manufacturing same
US20040082952 *6 avr. 200129 avr. 2004Dycus Sean T.Vessel sealer and divider
US20040176762 *6 avr. 20019 sept. 2004Lawes Kate R.Electrosurgical instrument reducing flashover
US20040250419 *13 juin 200316 déc. 2004Sremcich Paul S.Method of manufacturing jaw assembly for vessel sealer and divider
US20040260338 *18 mai 200423 déc. 2004Aesculap Ag & Co. KgSurgical instrument
US20050245925 *30 nov. 20043 nov. 2005Kobi IkiCartilage treatment probe
US20070244497 *16 avr. 200718 oct. 2007Applied Medical Resources CorporationLaparoscopic scissor blades
US20070244513 *14 avr. 200618 oct. 2007Ethicon Endo-Surgery, Inc.Endoscopic device
US20090306683 *4 juin 200810 déc. 2009Ethicon Endo-Surgery, Inc.Endoscopic drop off bag
US20100312240 *22 janv. 20109 déc. 2010Microline Surgical Inc.Scissor tip for bipolar high frequency endoscope
US20110230879 *27 mai 201122 sept. 2011Smith & Nephew, Inc.Cartilage treatment probe
US20110238066 *26 mars 201029 sept. 2011Tyco Healthcare Group LpClamp and Scissor Forceps
US20120059372 *7 sept. 20108 mars 2012Johnson Kristin DElectrosurgical Instrument
US20140155878 *3 déc. 20125 juin 2014Ethicon Endo-Surgery, Inc.Surgical instrument with curved blade firing path
USD64924915 févr. 200722 nov. 2011Tyco Healthcare Group LpEnd effectors of an elongated dissecting and dividing instrument
USD68022012 janv. 201216 avr. 2013Coviden IPSlider handle for laparoscopic device
USRE448347 déc. 20128 avr. 2014Covidien AgInsulating boot for electrosurgical forceps
DE10328512A1 *20 juin 200313 janv. 2005Aesculap Ag & Co. KgChirurgisches Instrument
DE202011000742U131 mars 20111 juin 2011Golsen Ltd.Elektrochirurgische bipolare Schere für Gewebeinzisionen mit Vorkoagulation
EP2366354A215 mars 201121 sept. 2011"Golsen Limited"Blade for surgical instrument, surgical scissors, and electrosurgical bipolar scissors for dissection and coagulation
Classifications
Classification aux États-Unis606/46, 606/50, 606/48
Classification internationaleA61B18/14, A61B18/12
Classification coopérativeA61B2018/146, A61B2018/00107, A61B18/1445, A61B2018/1415, A61B2018/1861, A61B2017/2945, A61B2018/126, A61B2018/1412, A61B18/1815, A61B2017/0088, A61B2018/1432
Classification européenneA61B18/14F2
Événements juridiques
DateCodeÉvénementDescription
27 avr. 1995ASAssignment
Owner name: SYMBIOSIS CORPORATION, FLORIDA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MCBRAYER, MICHAEL SEAN;KORTENBACH, JUERGEN ANDREW;REEL/FRAME:007466/0993
Effective date: 19950426
28 déc. 2001FPAYFee payment
Year of fee payment: 4
28 déc. 2005FPAYFee payment
Year of fee payment: 8
22 déc. 2009FPAYFee payment
Year of fee payment: 12